Sewing-machine.



J. R. MOPFATT.

SEWING MACHINE. APPLICATION FILED rm. 5, 1906.

Patented 0ct.28,1913.

UNITED STA'EES P AEENT OFFICE.

JAMES R. MOFFATT, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF- ILLINOIS.

SEWING-MACHINE.

Specification of Letters Patent.

Patented 0015,28, 1913.

Application filed February 5, 1906. Serial No. 299,504.

To all whom it may concern Be it known that I, JAMES R. MOFFATT, a citizen of the United States, residing at Chicago, in the county of Cook, State of Il'li- .nois, have invented certain new and useful independent rows of stitching.

In multiple line machines of the chain stitch type for shirtand other work, as crdinarily constructed, a plurality of needles set diagonally to each other respecting the line of feed, cooperate with a similar number of loopers passing at right angles across the line of feeds vIt has been found in practice that in order to stitch clear up to the finishing point with the needle which is nearer the front of the machine, the lines of stitching made by the other needles must extend beyond the finishing point, or if the line of stitching of the rearmost' needle marks the end of the seam, then the stitching lines of the needles nearer the front are not carried out to the edge of the fabric.

My object therefore, is to provide a machine in which the needles may be set abreast, or so that a line 'joining them is at right angles to the line of feed, and, therefore, the lines of stitching will be of the same length, and yet at the same time, a plurality of independent rows of stitches may be formed.

The invention consists in the matters hereinafter described and referred to in the appended claims.

The invention is illustrated in the accompanying drawings, in which,

Figure 1 is a perspective view of a portion of a sewing machine, illustrating the stitch-forming devices which embody my invention; and Fig. 2 is a similar view, illustrating the loopers'and needles. in a different position from that shown in Fig. 1. Fig. 3 is a top plan view showing the position of the needles'and the loopers when the--needlcs are descending, and the loopers havei fbeen movedto avoid the needles.

In these drawings, A represents the bed plate of a sewing machine, R the looper rocker which is supported on a supporting stud I, the axis of which is inclined to the 7 direction of feed. a It is oscillated on this axis by the pitman connection P,'and has bodily sidcwise oscillation in the usual way present in Union Special machines.

L, L, represent the loopers, the shanks of which are supported on the rocker frame, and the thread-carrying portionsl, Z, of which extend gradually toward each other. The needles are. shown at van, and are arranged abreastor so that a line joining them is at right angles to the line of feed.

As shown in Fig. 1, the needles have risen, to throw'out a loop and the portions Z, Z of loopers have entered the respective needle loops, Z Z and the looper portion Z run= ning in a path between the two needles.

In Fig. 2, the needles are going down, the loopers have swung over and are backing cut of the needle loops, the part Z passing between the needles in the backward or loopleaving movement. I

T represents the usual rotary take-up cam,

and to accommodate this take-up cam in a machine of this character, the looper rocker frame must have an offset, as shown at 0., The usual oscillatory movement is given to the looper rocker frame to give a sidewise needle-avo ding movement to t'he ,looper s, by means of the ordinary eccentric s and fork t, as shown in the drawings. Y

The purpose of arranging theloopers at different angles to the line of feed, that is, with their forward ends nearer together than their rear ends, is to prevent the right hand needle in going down from being deflected into thepath of the back looper, as it has been found in practice that the back looper has a tendency to interfere with the right hand looper in its reciprocation, and the throw of the loopers at different angles gives a greater space between the rear ends of said loopers.

Having thus described my invention,

what I claim as new and desire to secure b y Letters Patent, is 1 1. In a sewing machine, stitch-forming mechanism including a plurality of needles arranged abreast so that the line joining them is at right angles to the line of feed, a plurality of loopers coiiperating with said needles, means for oscillating said loopers into and out of the needle loops in a line diagonal to said line of feed, and means, for oscillating said loopers in the direction of the line of feed, whereby said loopers are given a needle ayoiding movement.

2. In a sewing machine, stitchiorming mechanism including a plurality of needles, arranged abreast so that a line joining them is at right angles to the line of feed, and

a plurality of loopers cooperating with said needles, and means for oscillating said loopers into and out of the needle loops, said loopers being constructed and arranged so that in their oscillation; the points thereof move from one position entirely at one side of the needles, as viewed in the direction of feed, to a position entirely at the other side of said needles, and means for rocking said loopers whereby they are given a needle avoiding movement.

3. In a sewing machine, stitch forming mechanism including a plurality of needles arranged abreast so that a line joining them is at right angles .to the line of feed, a plurality of loopers cooperating with said needles, a support of said loopers, said support being arranged on an. axis diagonal lo'oper carrying bearing arranged at an acute angle to the axis of the bearin s 01' the looper support, and said looper support being oil'set between its bearings so as to allow free oscillation of the looper carrier.

5. In a sewing machine, stitch forming mechanism, including a plurality of needles arranged abreast so that a line joining them is at right angles to the line of feed, a plurality of loopers cooperating with said needles, a carrier for said loopers, a support for said carrier, means for oscillating said carrier in a direction at an acute angle to the line of feed, whereby said loopers are moved into and out of the needle loop and means for oscillating said support for the looper carrier in. a direction parallel to the line of feed, whereby said loopers are given a needle avoiding movement.

6. in a sewing machine, stitch-forming mechanism including a plurality of needles, arranged abreast so that a line joining them is at right angles to the line of feed, and a plurality of loopers cooperating with said needles, and reciprocating across the line of feed in aapath diagonal thereto, said loopers being arranged with' their forward ends nearer together than their rear ends; substantially as described" In testimony whereof I allix my signature,

in presence of two witnesses.

JAMES R. MOFFATI.

"Witnesses CHESTER MCNEIL, H. C Amen. 

